Rotating rotary jar



June 2, 1,925. l y 1,540,436

. C. a "l'lKM-lhs4 ROTATING ROTARY JAR Filed oct. 29. 1924 z-sneets-seet, 1 u aA/n June 2, `1925. I 1,540,436

C. E. THOMAS ROTATING ROTARY JAR Filed oct. 29. 1924 2 *sheets-sheet` 2 the jar bein shown in the too may :rotary jar in the positionV shown in` Fig.

Patented 2, 19,25.

UNITED STATES j N 1,540,436 PATENT ,oFF-ICE.

` camas E. Tnonas, or Los exentas, camronuu.

BOTATING ROTARY .T AR.

Ap'pumion automne: as, 1924. serial mi. 746,534.

kTo all whom t may concern.'

Be it known that I, CHARLES E. THOMAS, a citizen of thee United States, residing at Los Angeles, in -the county of Los Angeles j and State of California, have invented new .and ,useful Improvements in Rotating Rotary Jars, of 'which the following is va, specification.

This invention relates to improvements inv provide means in the rotary jar for disen` gaging the connection between the tool and the drill tube so that one member of the jar may be lifted. so as -to impart an upward jar or impact upon the other member to which the tool is attached." w

With the foregoing and other object in view which will' be made manifest in the following detailed description and pointed out in the appended claims, reference is had to the accom anying drawings vfor an illustrative embo iment of the invention, where- 1n:-`

Figure 1 is a vertical section taken through the improved rota jar substantially lupon the line A-A o Fig. 5, showing the rotary jar in normal position where' by bhe tool is'caused to rotate with the drill tu Fig. 2 is a section similar to Fig. 1, the rotary jar being shownin position preparatory to impartlng an .upward impact or jar to the tool; y

Fig. 3 is` also n a section similar to. Fig. 1;,

(position after hav- A.an upwar impact or. jar to ing im arte Fi 4 kis a horizontal section taken substantlally on the line 41-4 of Fig. 2;

Fi 5 is ahorizontal section taken substantially on lthe line 5-5of Fi 1;

Fig. V6 is an enlarged vertica section taken on the 1inej6-6 of Fig. 1; l Fi .7 is a side elevation of [means which employed for releasably holding the 1 and .in Fig. 6,.the lower ed 8 is a top plan view of Fig. 7. Referring to the accompanying drawings \wherein similar `reference characters desig- -nate similar parts throughout, it is to be understood that the im roved rotary jars- -employs the elasticity of) the drill tube for producing the upward impact or jar upon the tool, which may have beconle .stuck in the bottom of the well. The jar consists of a sleeve 10 which has its upward endthreaded, as at 11, so that thesleeve may be secured to Vthe lower end of thedrill tube 12. Upon opposite sides-of the interior of the sleeve 10 there are' formed projections-13.

lWithin the sleeve 10 there is disposed a mandrel 14 capable of sliding movement relatively to the sleeve 10. The mandrel 14 is provided with a longitudinal bore 15 extending therethrough which permits circulation fluid to pass from the drill tube 1-2 to the tool T, which may be secured upon the lower end of the mandrel 14. Upon the opposite sides' of the mandrel 14 there are formed a pair of projections 16 which, as clearly shown in Fig. 5, are adapt- -ed to fit between the projections 13 upon they sleeve 10. In the position shown in Fig. 1, the projections 13 lit between the projections 16 formed upon the mandrel 14 and cause the mandrel 14 and the tool T to rotatewith thefsleeve 10 and the drill tube 12. The upper end of the mandrel'14 is Eovided with an enlarged head 17, and

sses 1 8 are formed u on the mandrel 14, which extend downwar ly from the head 17. The width of the bosses18 is equal to the widthof the projections 416 formed upon the mandrel 14, so that the projections 13 formed upon the sleeve 1() may slide between' the bosses 18. As clearly shown in Fig. 2, the top of the 'head 17 is recessed, as at`19, to receive packing 20, which is held' in place by means of a clrcular. plate 21 secured as by screws 22. The packing 20 bears against the interior surface of the sleeve 10 and pre-4 vents the escape of the circulation ,'fluid be tween the head 17 and the sleeve 10.4 A s indicated in Fig. 1, one upper cornerl of each of the projections 16 formed upon- 'the mandrel 14 is beveled olf, as at 23, and in a corresponding manner, one lower corner of each of the'. rejections 13 upon the sleeve 10 is beveledo as at 24. As clearly shown of the projections 13 formed u n thes eeve 1,0 are recessed as :11.25, an theinteriordiameter of the sleeve 10 adjacent the bottom of the sleeve is enlarged, as indicated at 26. A ring 27 is positioned adjacent the bottom' edges of the projections 13 upon the sleeve 10 and this rin carries a pair of spring fingers 28 upon w ich are mounted dogs 29. A coil spring 30 is positioned beneath the ring 27 and below the coil spring 30 thereis positioned a second ring 31 carrying upstanding arms`31.

Below. the ring 31 there is placed a sleeve 32 which is of a reduced upper diameter, as indicated at 32, which is threaded so that the sleeve 32 may be secured to the lower end of the sleeve 10. The portion 32a provides an/annular shoulder which holds the ring 31 in proper position. The lower end of the sleeve 32 is internally threaded to receive a nut 32", against which is positioned a channel-shaped'member 33 which Aholds packing 34 adapted to bear against the mandrel 14 and prevent the upward iow of circulation fluid thereabout. holds the channel-shaped member in position against the nut 32". The ring 31 is provided with one or more vertical grooves which receive pins 36 formed upon the interior of the sleeve 10. The pins 36 prevent rotation of the ring 31 within the sleeve 10. The ring 27 is provided with upwardly tapering lugs 37 which are receivable in corresponding recesses formed upon the projections 13. The lugs 37 are intended to maintain the ring 27 in its correct position within the sleeve 10, it being understood thatlthevl dogs 29 and the spring fingers 28 the recesses 25 keep the ring 27 in approximately its proper position. Small notches or recesses 40 are formed upon the opposite sides of the mandrel 14 and are adapted to receive the dogs 29 carried by the spring members 28, it beingunderstood that the sprin ingers28 serve to urge the dogs 29 towar the center of the mandrel 14.

The operation of the rotary jar is as follows: The dogs 29 engage the recesses 40 formed in the mandrel 14 when the sleeve 10 is in its lowermost position, -as in the position'shown in Fig. 1. The projections 13 and 16 are then in engagement with 'eachother and the tool T is-caused to rotate with the sleeve 10 'and the drill tube 12. If

for any reason, the tool T should/becomestuck, so that it cannot be rotated, it is then desirable to impart an upward jar upon-the tool T so as to loosen it. The drill tube 12 is then raised, which causes an upward movement of the sleeve "10. The dogs 29 beingV within the recesses 40 prevent .the

vupward movement ofthe ring- 27, and the spring 30 isthereforecompressed. The u Sward movement of the sleeve 10 causes t eA upward movement o f-the ring 31 and the upstandin'gqarmr 31, and as the arms 31* move upwardly about the mandrel 14 they` A nut/ 35v ,slide downwardly 1,540,4sa V posed completely within the recesses 25 formed in the projections 13. As shown in Fig. 1, the bosses 18 formed upon the man drel 14 have an angular rela-tion to the projections 16. As the sleeve 10 is lifted,

the projections 13 formed upon the sleeve slide upwardly from .between the projections 16 so as to 'occupy the position shown in Fig. 2. Because of the angular relation between the bosses 18 and the projections 16, the projections 13 engage the lower sur- 'faces of the bosses 18.

vWhen the rotary -jar `is in the position shown in Fig. 2, van upward strain is placed upon thedrilltube 12. Because of the length of the drill tube, a comparatively small upward strain, for instance 60,000 lbs., will cause a considerable stretching of the drill tube, the amount of stretching being determined by the length of the drill tube and by the cross sectional area of the drill tube. In the preferred embodiment of the invention, the vertical length 'of the bosses 18 is about six inche's and therefore' a suicient strain, isplaced upon the drill tube 12 to stretch the 'tube atleast six inches` and preferably more.- After the drill tube 12 has been stretched, the drill tube together with the sleeve are-slightly rotated toward the right. Thisl causes the projections 13 which arev in engagement with the bosses 18 as shown in Fig. 2, to slideoverthe ends of the bosses 18 and vupon becoming disengaged from the bosses 18, to be pulled upwardly against the.y head y17 because of the elasticity of the drill tube 12. The pro. j ections 13 upon slipping off the ends of the .bosses 18 and striking the head'17 impart a sudden upward blow to the head 17 and consequently to the mandre1`14 and the tool T. After a blow has been imparted'to the head 17 by the projections 13, the drill. tube 12 is then lowered. Because of the fact .that the sleeve 10 has been slightly rotated the bosses 18, the projections 1 3 are then partially inalignment with the'projections 16. However,upon lowering the drill tube and the drill tube 12- back to theiroriginal position, permittin the pro'ections 13. to

16 andA permitting the dogs 29 to re-enter the recesses 40, thereby resiliently holdin .the mandrel 14 inits original or norma position, as shown in Fig.l V1.Y As will readily tween t e projections so as to disengage the projectlons 13 'from y be understood, the tool is designed to employ the elasticity of the drill tube 12 to cause the upward blow to be given to the mandrel 14. This blow given in the above described manner is much sharper and of much greater magnitude than will be produced by attempting to lift the drill tube 12 so as to cause the projections 13 to strike the l bosses 18 or the head 17 for the reason that the inertia of the long string of drill tube 12 prevents the drill tube and the sleeve 1() together with the projection 13 from attaining a high upward velocity. It ywill be readily understood that if a single blow produced by the improvedrotary jar in the above describedV manner is "insufficient to loosen the tool T, the operation may be repeated as often' as necessary until the tool T has been completely loosened.

The rings 31 and 27- together with the spring 30 and the arms 31l together with the dogs 29 are not absolutely essential to the operation of the yjar as above described. However, these elements are preferably employed so that the tool T and the mandrel '14 may be .relea'sably retained in their normal positions asv shown in Fig. 1, even though the tool T is not ctually bearmg upon the bottom of the we l.

It will be understood that various changes in the detail of construction may be made vwithout departing from the spirlt -or scope of this invention as defined by the appendedr claims.

I claim:

1. A rotary jar comprising a sleeve attachable to a drill tube, a mandrel slidabley within said sleeve, projections formed upon the interior surfaceA of `said sleeve and upon the exterior surface o`f said mandrel adapted"to intert to cause said mandrel to rotate with said sleeve, and a head formed upon said mandrel adapted to be engaged by the projections upon said sleeve, whereby upward movement ofsaid sleeve will impart an upward jar to saidmandrel.

2. Arotary jar comprisinga sleeve attachable to a drill tube, a mandrel slidable.-` in said sleeve to which a tool is adapted to be secured, projections formed' upon the interior surface o-f said sleeve and upon thei exterior surface o f said mandrel adapted to engage and cause said mandrel to rotate with said sleeve,'a head formed upon said mandrel, and 7bosses formed upon said mandrel adjacent. said 'head adaptedtobe engaged by'the projections upon said sleeve upon upward movement thereof, whereby by applying an upward pull to said sleeveA and rotating, said sleeve, the projections formed upon said sleeve may be disengaged.l

by impart-ing an upward jar to said mandrel@ within said sleeve, projections formed upon the interior surface of said sleeve and upon the exterior surface of said mandrel adapted vto interit to cause said mandrel to rotate with said sleeve, a head formed upon said mandrel adapted to be engaged by the projections upon said sleeve, whereby upward movement of said sleeve kwill impart an upward jar to said mandrel, and spring means for releasably holding said mandrel and sleeve in position whereby said projections upon saidsleeve and mandrel are disposed in interfitting relation.

4. A rotary; tachable toxdril tube, a mandrel sli'dable in said sleeve to which a tool'is adapted to be secured, projections formed upon the -in- `jar comprising a sleeve at.-

terior surface of said sleeve and upon thev exterior' surface of said mandrel adapted to engage and cause said mandrel to rotate with said sleeve, a head formed upon said mandrel, bosses formed upon said mandrel adjacent said head adapted to be engaged by the projections upon said sleeve upon .upward movement thereof, whereby by applying an upward pull to said sleeve and rotating said sleeve, the projections formed upon said sleeve may be disengaged from said bosses and strike said head, thereby imparting an upward jar to said mandrel, and spring means for releasably holding sleeve Aand mandrel in such position that the projections upon said sleeve and mandrel are engaged.

5. A rotary jar comprising a sleeve attachable to a drill tube, a mandrel slidable in said sleeve to which a tool is adapted to be secured, projections formed upon the interior surface of said sleeve and upon the exterior surface 0f said mandrel adapted to 'engage and cause said mandrel to rotate withsaid-sleeve, a head formed upon, said mandrel, and bosses formed upon said mandrel adjacent saidhead adapted to beengaged by the projections upon said sleeve upon upward movement thereof, whereby by applying anupward pull to said sleeve and rotating said sleeve, the projections formed upon said sleeve may be disengaged from said bosses'and strike said head, thereby im-l parting an upward jar to said mandrel, said bosses being so arranged with respect to the said projections upon said mandrel as to be engaged by the projections upon "said sleeve upon vertical movement of said sleeve with respectto said mandrel. 1

65A rotary jar comprising .a sleeve attachable to a drill tube, amandrelslidable in said sleeve to which a tool is adapted to be secured, projections formed upon the interior surface 4of Isaid sleeve and upon the vfrom said bosses and strike said head, there-@exterior surface of saidv mandrel adapted to engage vandcause said mandrel to rotate rotary jar comprising a sleeve atwith said sleeve, a headformed upon said tachable to a drill tube, amandrellslidable mandrel, and bosses formed upon said .man-

drel adjacent said head adapted to be en .gaged by the projections upon said sleeve upon upward movement thereof, whereby by applying an upward pull to said 4sleeve and rotating said sleeve, the projections formed upon said sleeve may be disengaged from said bosses and strike said head, thereby impartingan upward jar to said mandogs carried' by said ring and receivable in' .said recesses, and means for withdrawing said dogs fromsaid recesses upon'upward movement of said sleeve relatively to saiil drel, the engaging surfaces betweenv said bosses and the projections upon said sleeve being substantially fiat, horizontal surfaces.

7. A rotary jar comprising la sleehve at` tachable to a drill tube, a mandrel to which a tool is adapted to be connected vslidable l5 within saidV sleeve, projections formed upon said slee-ve aiid mandrel adapted to engage to prevent relative rotation between said sleeve and mandrel, a head 'formed upon said mandrel, bosses formed upon said mandrel extending downwardly from said head,

recesses formed upon said mandrel, a ring disposed within said sleeve, spring actuated mandrel.

8. A rotary jar comprising a. sleeve attafchabieto a drill tube, a mandrel til-which .a tool is adapted to be connected slidablc within said sleeve, projections formed upon .saidsleeve andpmandrel adapted to engage to prevent relative rotation between said sleeve and mandrel, a head formed uponsaid Imandrel, 'bosses formed'upon said mandrel extending downwardly' from said head, rc-

cesses formed upon said mandrel, a ring dis-- `posed within said sleeve, spring -actuated dogs carried by said ring and receivable in said recesses, means for withdrawing said dogs from said recesses vu on upward movement of said sleeve relatively to'sad mandrel, and packing disposed between said gageable bythe projections upon said sleeve,

said bosses being so arranged as to have por tionsv directly above the vprojections upon said sleeve when the projections upon the sleeve aref interfitting with vthe projections uponsaid mandrel, whereby upon a straight upward slidin ofthe sleeve with respect to the mandrel, t e projections upon the sleeve will engage the bosses, andu on rotation of the sleeve the rojections wil disengage the bosses and strilie the head.

10. In a rotary jar having a mandrel and a sleeveslidable thereon, means for causing the mandrel and the sleeve to be vlocked against relativerotation, means-for causing the sleeve upon upward movement to impart a jar tothe mandrel, and means for releasably retaining the mandrel and sleeve inl such position as .to be lockedv against relative -icotation In testimony whereof Ihave signed my name to this specification.

y CHAS. E. THOMAS. 

